Listeria, Erysipelothrix, Lactobacilli,...

Listeria monocytogenes

Listeria monocytogenes

• People at higher risk

• What is listeriosis

• Description

– Gram-positive Bacilli

– 1 -5 Peritrichous flagella

• Pathogenesis

Listeria monocytogenes

• Clinical significance

• Immunocompromised individuals

• Infection in pregnancy and neonates

• Other clinical manifestations

Listeria monocytogenes

• Transmission

• Epidemiology

Listeria monocytogenes

• Laboratory diagnosis

– Motility testing

– Grows on Muller Hinton agar with

sheep blood as enrichment

– Hemolysis

– Catalase test

– Esculin hydrolysis

– CHO fermentation

Listeria monocytogenes

• Treatment

• Control

Erysipelothrix

• Description

– Gram-positive Bacilli

– Non-spore former

– Erysipelothrix rhusiopathiae

Erysipelothrix

• Clinical significance

• People at higher risk:

Erysipelothrix

• Laboratory ID Erysipelothrix rhusiopathiae

– Gram stain

– Motility testing

– Grow @ salt ??

– Hemolysis

– Catalase test

– Triple Sugar Iron (TSI) medium

– Gelatin stab culture

Lactobacilli

Lactobacilli

• Description

– Gram-positive Bacilli

– Non-spore forming

• Description and Clinical significance

Lactobacilli

• Laboratory ID

– Motility testing

– Hemolysis

– Catalase test

– Oxidase test

– Nitrate test

– TSI medium

Kurthia

Kurthia

• Description and Clinical significance

• Gram-positive bacilli, in chains

• Meat after storage for a few days at 16⁰C

• Farm animals especially chickens and pigs

• Patients suffering from diarrhea

Kurthia

• Description

• Non-spore forming

• Motility testing

• Nutrient gelatin slants

• Catalase test